package day4;

public class Test2 {
    public static void test1(int a){

    }
    public static void test2(Integer a){

    }
    public static void test3(long a){

    }
    public static void test4(Long a){

    }
    public static void main(String[] args) {
        test1(1);
        test2(1);
        test3(1);
        //不支持隐式类型
        //test4(1);
        test4(1L);
    }
}
